[Info-vax] Volume shadowing and current SCSI standards ?

[Phillip Helbig undress to reply]

In article <68f2137f-d0e6-4921-98ee-854022f7d751n at googlegroups.com>,
abrsvc <dansabrservices at yahoo.com> writes: 

> The current HBS product requires the use of the READ/WRITE LONG commands
> so you are correct HBS won't work with devices that don't support it. 
> Many customers now use SAN devices and the "shadowing" takes place there
> rather than being host based which avoids the issue. I have seen the
> shift with many of my clients to this "new" way.  Yes HBS is valuable
> for many reasons, but there are alternatives that are increasingly being
> used today.  While this should be addressed, I don't think it has the
> urgency that you incidate. 

Merely the fact that most don't expect such an essential feature to 
break should be reason to address it.

SAN?  Yes, can provide help if a disk fails.  But what about multi-site 
clusters with members with physical connections to different nodes?

And what about HBVS on hobbyist machines?  :-)